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  • 1
    Online Resource
    Online Resource
    YOUMARES 8 – Oceans Across Boundaries: Learning from each other : Proceedings of the 2017 conference for YOUng MARine RESearchers in Kiel, Germany (2018)
    Cham : Springer International Publishing
    Details Availability
    Keywords: Aquatic biology ; Endangered ecosystems ; Wildlife management ; Science Study and teaching ; Marine & Freshwater Sciences ; Aquatic biology ; Endangered ecosystems ; Wildlife management ; Science ; Marine Sciences ; Marine Sciences ; Aquatic ecology . ; Freshwater. ; Ecosystems. ; Wildlife. ; Fish. ; Science education. ; Biodiversity ; Biodiversity ; Science Study and teaching ; Freshwater ecology. ; Marine ecology. ; Hydrology. ; Biotic communities. ; Animal culture. ; Water.
    Description / Table of Contents: This open access book presents the proceedings volume of the YOUMARES 8 conference, which took place in Kiel, Germany, in September 2017, supported by the German Association for Marine Sciences (DGM). The YOUMARES conference series is entirely bottom-up organized by and for YOUng MARine RESearchers. Qualified early career scientists moderated the scientific sessions during the conference and provided literature reviews on aspects of their research field. These reviews and the presenters’ conference abstracts are compiled here. Thus, this book discusses highly topical fields of marine research and aims to act as a source of knowledge and inspiration for further reading and research
    Type of Medium: Online Resource
    Pages: Online-Ressource (XVII, 251 p. 58 illus., 46 illus. in color, online resource)
    Edition: Springer eBook Collection. Earth and Environmental Science
    ISBN: 9783319932842
    Series Statement: SpringerLink
    URL: http://dx.doi.org/10.1007/978-3-319-93284-2
    URL: https://doi.org/10.1007/978-3-319-93284-2
    DOI: 10.1007/978-3-319-93284-2
    Language: English
    Note: Open Access
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  • 2
    Online Resource
    Online Resource
    YOUMARES 8 - Oceans Across Boundaries : Proceedings of the 2017 Conference for YOUng MARine RESearchers in Kiel, Germany (2018)
    Cham : Springer International Publishing AG
    Details Availability
    Description / Table of Contents: Intro -- Dedication -- Foreword -- Preface -- Acknowledgments -- Contents -- Contributors -- About the Editors -- YOUMARES - A Conference from and for YOUng MARine RESearchers -- Concept and Structure of YOUMARES -- A Brief History of Getting Larger -- How to Get in Contact: Personal Experiences as a Young Researcher -- YOUMARES - Science Works Best When Being Shared -- YOUMARES and the DGM - Interlinking the Young and the Experienced -- YOUMARES - A Conference for the Future -- References -- Can Climate Models Simulate the Observed Strong Summer Surface Cooling in the Equatorial Atlantic? -- The Equatorial Atlantic: A Climate Hot Spot -- Climate Models: A Crash Course -- Can Climate Models Reproduce the Observed Seasonality of the Equatorial Atlantic Climate System? -- The Equatorial Atlantic Warm Bias: Symptoms -- Which Processes Produce the Equatorial Atlantic Warm Bias? -- Outlook: Implications for the Usability of CGCMs in the Equatorial Atlantic -- Appendix -- References -- The Physical System of the Arctic Ocean and Subarctic Seas in a Changing Climate -- Introduction -- Arctic Sea Ice -- Sea Ice Cycle -- Sea Ice Role in the Climate System -- Arctic - Subarctic Atmosphere -- Atmospheric Circulation: Why Does It Matter? -- Major Modes of Atmospheric Circulation in the Arctic -- Ocean -- Geography of the Arctic Mediterranean -- Arctic Ocean Circulation and Hydrography -- Fresh water -- River Runoff and Atmospheric Fluxes -- Arctic Glacier and Greenland Ice Sheet Melt -- Oceanic Transport of Sea Ice and Liquid Fresh water -- Heat and Volume Fluxes in the Arctic Ocean -- Atlantic Water -- Outlook -- Appendix -- References -- Marine Optics and Ocean Color Remote Sensing -- Introduction to Ocean Color, Fundamental Concepts, and Optical Tools -- Role of Light in Water -- Fate of Light in Water: Optically Active Constituents and Optical Properties.
    Type of Medium: Online Resource
    Pages: 1 online resource (259 pages)
    Edition: 1st ed.
    ISBN: 9783319932842
    URL: https://ebookcentral.proquest.com/lib/kxp/detail.action?docID=5504855
    Language: English
    Note: Description based on publisher supplied metadata and other sources
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  • 3
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    Copepod community ingestion and respiration in the Eastern Atlantic Ocean during POLARSTERN cruise PS81 (ANT-XXIX/1) (2018)
    PANGAEA
    In:  University of Bremen, Marine Zoology | Supplement to: Bode, Maya; Koppelmann, Rolf; Teuber, Lena; Hagen, Wilhelm; Auel, Holger (2018): Carbon Budgets of Mesozooplankton Copepod Communities in the Eastern Atlantic Ocean-Regional and Vertical Patterns Between 24°N and 21°S. Global Biogeochemical Cycles, 32(5), 840-857, https://doi.org/10.1029/2017GB005807
    Details
    Publication Date: 2023-08-05
    Description: The copepods' impact on vertical carbon flux was assessed for stratified depth layers down to 2000 m at six stations along a transect between 24°N and 21°S in the eastern Atlantic Ocean in October/November 2012. Total copepod community consumption ranged from 202-604 mg C m⁻² day⁻¹, with highest ingestion rates in the tropical North Atlantic. Calanoids consumed 75-90% of the particulate organic carbon (POC) ingested by copepods, although the relative contribution of cyclopoids (mostly Oncaeidae) increased with depth. Net ingestion (=consumption - fecal pellet egestion) of POC varied from 106-379 mg C m⁻² day⁻¹ for calanoids and 37-51 mg C m⁻² day⁻¹ for cyclopoids, corresponding to 16-58% and 5-9%, respectively, of primary production (PP). In total, 9-33% and 2-5% of PP were respired as inorganic carbon by calanoids and cyclopoids, respectively. Copepod ingestion was highly variable between stations and depth layers, especially in the epi- and upper mesopelagic zone. Diel vertical migrants such as Pleuromamma enhanced the vertical flux to deeper layers, particularly in the region influenced by the Benguela Current. The impact of copepod communities on POC flux decreased below 1000 m and POC resources reaching the bathypelagic zone were far from being fully exploited by copepods. As key components, copepods are important mediators of carbon fluxes in the ocean. Their biomass, community composition and interactions strongly affect the magnitude of organic carbon recycled or exported to deeper layers. High variability, even at smaller vertical scales, emphasizes the complex dynamics of the biological carbon pump.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
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    Sampling information and phylogenetic trees for Calanoides natalis, link to supplementary material (2017)
    PANGAEA
    In:  Supplement to: Höring, Flavia; Cornils, Astrid; Auel, Holger; Bode, Maya; Held, Christoph (2017): Population genetic structure of Calanoides natalis (Copepoda, Calanoida) in the eastern Atlantic Ocean and Benguela upwelling system. Journal of Plankton Research, 1-13, https://doi.org/10.1093/plankt/fbx035
    Details
    Publication Date: 2023-08-05
    Description: The population genetic structure of Calanoides natalis (ex Calanoides carinatus; Copepoda, Calanoida), an ecologically important component of African upwelling systems, was studied in order to (i) search for potential cryptic species, (ii) describe spatial patterns in the distribution of genetic variance and (iii) identify potential barriers to gene flow. Samples were obtained in the eastern Atlantic Ocean from the Iberian Peninsula to Namibia. Analysis of mitochondrial (cytochrome c oxidase subunit I; COI) and nuclear (citrate synthase; CS) marker genes revealed a genetically cohesive population of C. natalis with a prevalent shift in allele frequencies. The discovery of a deep split solely present in the mitochondrial dataset does not point to cryptic speciation, but rather suggests the occurrence of nuclear mitochondrial pseudogenes or incomplete reproductive isolation upon secondary contact. Genetic differentiation between the northern and southern hemisphere was significant, which may point to a potential, but permeable barrier close to the equator. No vertical genetic structuring was detected in the northern Benguela implying that horizontal differentiation was more pronounced than vertical structuring. Retention mechanisms and the oxygen minimum zone did not have a strong impact on genetic differentiation of C. natalis in the Benguela region.
    Type: Dataset
    Format: application/zip, 12.9 kBytes
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  • 5
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    Abundance and distribution of planktonic Copepoda during POLARSTERN cruise PS81 (ANTXXIX/1) (2018)
    PANGAEA
    In:  University of Bremen, Marine Zoology | Supplement to: Bode, Maya; Hagen, Wilhelm; Cornils, Astrid; Kaiser, Patricia; Auel, Holger (2018): Copepod distribution and biodiversity patterns from the surface to the deep sea along a latitudinal transect in the eastern Atlantic Ocean (24°N to 21°S). Progress in Oceanography, 161, 66-77, https://doi.org/10.1016/j.pocean.2018.01.010
    Details
    Publication Date: 2023-08-05
    Description: Vertical distribution, community structure and diversity of calanoid copepods were studied at six stations along a latitudinal transect from 24°N to 21°S in the eastern Atlantic Ocean, resolving nine discrete depth layers to 2000 m. Total copepod abundances integrated from 0-2000 m ranged from 148,000 to 197,000 ind m-2. Usually, abundance and biomass were highest in the upper 100 m, exponentially decreasing with increasing depth. Only at the northern and southernmost stations, a deeper biomass maximum was observed at 100-200 m and 200-400 m, respectively. In total, 26 families, 79 genera and at least 172 species were identified among calanoid copepods. Although there were certain regional differences in species composition between tropical and subtropical stations from north to south, depth had the strongest impact on the community structure of calanoids, resulting in statistically distinct communities in different depth zones. Maximum diversity of calanoids was observed between 100-200 m in the tropical zone and between 400-700 m in subtropical regions. Various interacting mechanisms such as vast spatial extent of the ecosystem, physical stability, avoidance from predators under dim light, small population sizes and high biologically generated heterogeneity possibly contribute to the biodiversity maxima in the twilight zone.
    Keywords: Acartia spp.; Acrocalanus spp.; Aetideidae, copepodites; Aetideopsis carinata; Aetideopsis rostrata; Aetideopsis sp.; Aetideus acutus; Aetideus arcuatus; Aetideus armatus; Aetideus bradyi; Aetideus giesbrechti; Amallothrix spp.; ANT-XXIX/1; Arietellus spp.; Augaptilidae; Augaptilus longicaudatus; Augaptilus megalurus; Augaptilus spp.; Brodskius cf. paululus; Calanidae, copepodites; Calanoida, copepodites; Calanoida, total; Calanoides natalis; Calanus sp.; Calocalanus spp.; Canarias Sea; Candacia spp.; Centraugaptilus sp.; Centropages bradyi; Cephalophanes spp.; Chiridiella smoki; Chiridiella sp.; Chiridius spp.; Chirundina streetsii; Clausocalanus spp.; Comment; Counting, copepoda; Ctenocalanus vanus; Date/Time of event; Delibus cf. nudus; Depth, bottom/max; Depth, top/min; DEPTH, water; Disco spp.; Disseta palumbii; Elevation of event; Euaugaptilus spp.; Eucalanus hyalinus; Euchaeta acuta; Euchaeta marina; Euchaeta media; Euchaeta paraconcinna; Euchaeta spp.; Euchaetidae, copepodites; Euchirella amoena; Euchirella curticauda; Euchirella pulchra; Euchirella rostrata; Euchirella splendens; Euchirella spp.; Event label; Falsilandrumius sp.; Farrania spp.; Gaetanus armiger; Gaetanus brevicornis; Gaetanus brevispinus; Gaetanus kruppii; Gaetanus latifrons; Gaetanus miles; Gaetanus minor; Gaetanus pileatus; Gaetanus spp.; Gaetanus tenuispinus; Gaussia princeps; Haloptilus acutifrons; Haloptilus austini; Haloptilus fons; Haloptilus mucronatus; Haloptilus oxycephalus; Haloptilus plumosus; Haloptilus spiniceps; Haloptilus spp.; Hemirhabdus sp.; Heteramalla sarsi; Heterorhabdus spinifrons; Heterorhabdus spp.; Heterostylites major; Labidocera spp.; Latitude of event; Longitude of event; Lophothrix frontalis; Lophothrix humilifrons; Lophothrix latipes; Lophothrix quadrispinosa; Lophothrix similis; Lophothrix spp.; Lucicutia aurita; Lucicutia bicornuta; Lucicutia curta; Lucicutia grandis; Lucicutia lucida; Lucicutia macrocera; Lucicutia magna; Lucicutia spp.; Lucicutia wolfendeni; Mecynocera clausi; Megacalanus princeps; Mesocalanus tenuicornis; Metridia brevicauda; Metridia curticauda; Metridia discreta; Metridia effusa; Metridia lucens; Metridia princeps; Metridia spp., copepodites; Metridia venusta; Microcalanus spp.; Mimocalanus spp.; Monacilla tenera; Monacilla typica; Mospicalanus sp.; MSN; Multiple opening/closing net; Nannocalanus minor; Neocalanus gracilis; Neocalanus robustior; Nullosetigera bidentata; Nullosetigera helgae; Nullosetigera impar; Nullosetigera mutica; Nullosetigera spp.; Oithonidae; Oncaeidae; Onchocalanus sp.; Paracalanus spp.; Paraeuchaeta aequatorialis; Paraeuchaeta gracilis; Paraeuchaeta sp.; Paraeuchaeta spp.; Paraheterorhabdus cf. compactus; Paraugaptilus sp.; Pareucalanus cf. sewelli; Phaenna spinifera; Phaennidae; Pleuromamma abdominalis; Pleuromamma borealis; Pleuromamma quadrungulata; Pleuromamma robusta; Pleuromamma spp.; Pleuromamma xiphias; Polarstern; Pontellina spp.; PS81; PS81/005-6; PS81/008-6; PS81/009-4; PS81/010-3; PS81/014-4; PS81/017-7; Pseudhaloptilus sp.; Pseudoamallothrix spp.; Pseudochirella sp.; Rhincalanus cornutus; Rhincalanus nasutus; Scaphocalanus spp.; Scolecithricella maritima; Scolecithricella spp.; Scolecithricella vittata; Scolecithrix bradyi; Scolecithrix danae; Scolecitrichidae; Scolecitrichopsis ctenopus; Scolecitrichopsis sp.; Scolecitrichopsis tenuipes; Scottocalanus helenae; Scottocalanus persecans; Scottocalanus securifrons; South Atlantic Ocean; Spinocalanus spp.; Subeucalanus mucronatus; Subeucalanus spp.; Subeucalanus subtenuis; Temora stylifera; Temorites brevis; Temorites elongata; Temorites minor; Temorites sarsi; Temorites spp.; Temoropia mayumbaensis; Temoropia minor; Teneriforma spp.; Tharybis sp.; Undeuchaeta cf. major; Undinella spp.; Undinula vulgaris; Valdiviella sp.; Volume
    Type: Dataset
    Format: text/tab-separated-values, 9412 data points
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  • 6
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    Copepod community ingestion during POLARSTERN cruise PS81 (ANT-XXIX/1) (2018)
    PANGAEA
    In:  University of Bremen, Marine Zoology
    Details
    Publication Date: 2023-08-05
    Keywords: Acartia spp., ingestion rate of carbon; Acrocalanus spp., ingestion rate of carbon; Aetideidae, c1-c3, ingestion rate of carbon; Aetideopsis spp., ingestion rate of carbon; Aetideus spp., ingestion rate of carbon; Amallothrix spp., ingestion rate of carbon; ANT-XXIX/1; Arietellus spp., ingestion rate of carbon; Augaptilidae, ingestion rate of carbon; Augaptilus spp., ingestion rate of carbon; Brachycalanus spp., ingestion rate of carbon; Brodskius cf. paululus, ingestion rate of carbon; Calanidae, c1-c3, ingestion rate of carbon; Calanoida, ingestion rate of carbon; Calanoida indeterminata, copepodites, ingestion rate of carbon; Calanus sp., ingestion rate of carbon; Calculated; Calocalanus spp., ingestion rate of carbon; Canarias Sea; Candacia spp., ingestion rate of carbon; Carbon, organic, particulate, flux; Centraugaptilus sp., ingestion rate of carbon; Centropages bradyi, ingestion rate of carbon; Cephalophanes spp., ingestion rate of carbon; Chiridiella smoki, ingestion rate of carbon; Chiridius poppei, ingestion rate of carbon; Chirundina streetsii, ingestion rate of carbon; Clausocalanus spp., ingestion rate of carbon; Comment; Ctenocalanus cf. vanus, ingestion rate of carbon; Cyclopoida, ingestion rate of carbon; Date/Time of event; Delibus cf. nudus, ingestion rate of carbon; Depth, bottom/max; Depth, top/min; DEPTH, water; Disco spp., ingestion rate of carbon; Disseta palumbii, ingestion rate of carbon; Elevation of event; Euaugaptilus spp., ingestion rate of carbon; Eucalanus hyalinus, ingestion rate of carbon; Euchaeta spp., ingestion rate of carbon; Euchaetidae, c1-c3, ingestion rate of carbon; Euchirella spp., ingestion rate of carbon; Event label; Falsilandrumius sp., ingestion rate of carbon; Farrania spp., ingestion rate of carbon; Gaetanus spp., ingestion rate of carbon; Gaussia princeps, ingestion rate of carbon; Haloptilus spp., ingestion rate of carbon; Hemirhabdus sp., ingestion rate of carbon; Heteramella sp., ingestion rate of carbon; Heterorhabdus spp., ingestion rate of carbon; Heterstylites major, ingestion rate of carbon; Labidocera spp., ingestion rate of carbon; Latitude of event; Longitude of event; Lophothrix spp., ingestion rate of carbon; Lucicutia spp., ingestion rate of carbon; Mecynocera clausii, ingestion rate of carbon; Megacalanus princeps, ingestion rate of carbon; Mesocalanus tenuicornis, ingestion rate of carbon; Metridia spp., ingestion rate of carbon; Microcalanus spp., ingestion rate of carbon; Mimocalanus spp., ingestion rate of carbon; Monacilla spp., ingestion rate of carbon; Mospicalanus sp., ingestion rate of carbon; MSN; Multiple opening/closing net; Nannocalanus minor, ingestion rate of carbon; Neocalanus spp., ingestion rate of carbon; Nullosetigera spp., ingestion rate of carbon; Oithona spp., ingestion rate of carbon; Oncaea spp., ingestion rate of carbon; Onchocalanus spp., ingestion rate of carbon; Paracalanus spp., ingestion rate of carbon; Paraeuchaeta spp., ingestion rate of carbon; Paraheterorhabdus cf. compactus, ingestion rate of carbon; Paraugaptilus sp., ingestion rate of carbon; Pareucalanus cf. sewelli, ingestion rate of carbon; Phaenna spinifera, ingestion rate of carbon; Pleuromamma spp., ingestion rate of carbon; Polarstern; Pontellina spp., ingestion rate of carbon; PS81; PS81/005-6; PS81/008-6; PS81/009-4; PS81/010-3; PS81/014-4; PS81/017-7; Pseudhaloptilus spp., ingestion rate of carbon; Pseudoamallothrix spp., ingestion rate of carbon; Pseudochirella sp., ingestion rate of carbon; Rhincalanus spp., ingestion rate of carbon; Scaphocalanus spp., ingestion rate of carbon; Scolecithricella spp., ingestion rate of carbon; Scolecithrichidae, ingestion rate of carbon; Scolecithrichopsis spp., ingestion rate of carbon; Scolecithrix spp., ingestion rate of carbon; Scottocalanus spp., ingestion rate of carbon; South Atlantic Ocean; Spinocalanus spp., ingestion rate of carbon; Subeucalanus spp., ingestion rate of carbon; Temora stylifera, ingestion rate of carbon; Temorites spp., ingestion rate of carbon; Temoropia spp., ingestion rate of carbon; Teneriforma spp., ingestion rate of carbon; Tharybis spp., ingestion rate of carbon; Undeuchaeta spp., ingestion rate of carbon; Undinella spp., ingestion rate of carbon; Undinula vulgaris, ingestion rate of carbon; Valdiviella spp., ingestion rate of carbon; Volume
    Type: Dataset
    Format: text/tab-separated-values, 4888 data points
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  • 7
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    Copepod community respiration during POLARSTERN cruise PS81 (ANT-XXIX/1) (2018)
    PANGAEA
    In:  University of Bremen, Marine Zoology
    Details
    Publication Date: 2024-01-26
    Keywords: ANT-XXIX/1; BONGO; Bongo net; Canarias Sea; Date/Time of event; Depth, bottom/max; Depth, top/min; DEPTH, water; Dry mass per individual; Elevation of event; Event label; Ingestion rate of carbon per day per individual; Latitude of event; Longitude of event; MSN; Multiple opening/closing net; PLA; Plankton net; Polarstern; PS81; PS81/001-3; PS81/001-4; PS81/002-3; PS81/004-1; PS81/004-4; PS81/004-6; PS81/005-6; PS81/007-2; PS81/008-6; PS81/009-4; PS81/010-3; PS81/011-4; PS81/012-4; PS81/013-6; PS81/014-4; Respiration rate, carbon, per individual; Respiration rate, oxygen, per dry mass; Respiration rate, oxygen, per individual; Sample code/label; South Atlantic Ocean; Species; Stage; Treatment: temperature
    Type: Dataset
    Format: text/tab-separated-values, 2942 data points
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  • 8
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    Seawater carbonate chemistry, growth rate and morphology of Calcidiscus leptoporus (RCC1135) during experiments, 2011 (2011)
    PANGAEA
    In:  Supplement to: Langer, Gerald; Bode, Maya (2011): CO2 mediation of adverse effects of seawater acidification in Calcidiscus leptoporus. Geochemistry, Geophysics, Geosystems, 12(5), Q05001, https://doi.org/10.1029/2010GC003393
    Details
    Publication Date: 2024-03-15
    Description: The coccolithophore Calcidiscus leptoporus (strain RCC1135) was grown in dilute batch culture at CO2 levels ranging from ~200 to ~1600 µatm. Increasing CO2 concentration led to an increased percentage of malformed coccoliths and eventually (at ~1500 µatm CO2) to aggregation of cells. Carbonate chemistry of natural seawater was manipulated in three ways: first, addition of acid; second, addition of a HCO3/CO3 solution; and third, addition of both acid and HCO3/CO3 solution. The data set allowed the disentangling of putative effects of the different parameters of the carbonate system. It is concluded that CO2 is the parameter of the carbonate system which causes both aberrant coccolithogenesis and aggregation of cells.
    Keywords: Alkalinity, Gran titration (Gran, 1950); Alkalinity, total; Aragonite saturation state; Bicarbonate ion; BIOACID; Biological Impacts of Ocean Acidification; Bottles or small containers/Aquaria (〈20 L); Calcidiscus leptoporus; Calcidiscus leptoporus, morphology; Calcidiscus leptoporus, morphology, standard deviation; Calcification/Dissolution; Calcite saturation state; Calculated; Calculated, see reference(s); Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, particulate, per cell; Carbon, organic, particulate, per cell; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Conductivity meter (WTW, Weilheim, Gemany); EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Experimental treatment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gas chromatography (EURO EA Elemental Analyser, EUROVECTOR); Growth/Morphology; Growth rate; Growth rate, standard deviation; Haptophyta; Identification; Laboratory experiment; Laboratory strains; Mediterranean Sea Acidification in a Changing Climate; MedSeA; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Particulate inorganic carbon, production, standard deviation; Particulate inorganic carbon/particulate organic carbon ratio; Particulate inorganic carbon/particulate organic carbon ratio, standard deviation; Particulate inorganic carbon per cell, standard deviation; Particulate inorganic carbon production per cell; Particulate organic carbon, production, standard deviation; Particulate organic carbon content per cell, standard deviation; Particulate organic carbon production per cell; Pelagos; pH; Photometrically using autoanalyzer QUAATRO; Phytoplankton; Primary production/Photosynthesis; Salinity; Single species; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 246 data points
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  • 9
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    Fatty acid and stable isotope composition of calanoid copepods in the open eastern Atlantic Ocean during POLARSTERN cruise ANT-XXIX/1 (2015)
    PANGAEA
    In:  Supplement to: Bode, Maya; Hagen, Wilhelm; Schukat, Anna; Teuber, Lena; Fonseca-Batista, Debany; Dehairs, Frank; Auel, Holger (2015): Feeding strategies of tropical and subtropical calanoid copepods throughout the eastern Atlantic Ocean – Latitudinal and bathymetric aspects. Progress in Oceanography, 138, 268-282, https://doi.org/10.1016/j.pocean.2015.10.002
    Details
    Publication Date: 2024-03-09
    Description: The majority of global ocean production and total export production is attributed to oligotrophic oceanic regions due to their vast regional expanse. However, energy transfers, food-web structures and trophic relationships in these areas remain largely unknown. Regional and vertical inter- and intra-specific differences in trophic interactions and dietary preferences of calanoid copepods were investigated in four different regions in the open eastern Atlantic Ocean (38°N to 21°S) in October/November 2012 using a combination of fatty acid (FA) and stable isotope (SI) analyses. Mean carnivory indices (CI) based on FA trophic markers generally agreed with trophic positions (TP) derived from d15N analysis. Most copepods were classified as omnivorous (CI ~0.5, TP 1.8 to ~2.5) or carnivorous (CI 〉=0.7, TP 〉=2.9). Herbivorous copepods showed typical CIs of 〈=0.3. Geographical differences in d15N values of epi- (200-0 m) to mesopelagic (1000-200 m) copepods reflected corresponding spatial differences in baseline d15N of particulate organic matter from the upper 100 m. In contrast, species restricted to lower meso- and bathypelagic (2000-1000 m) layers did not show this regional trend. FA compositions were species-specific without distinct intra-specific vertical or spatial variations. Differences were only observed in the southernmost region influenced by the highly productive Benguela Current. Apparently, food availability and dietary composition were widely homogeneous throughout the oligotrophic oceanic regions of the tropical and subtropical Atlantic. Four major species clusters were identified by principal component analysis based on FA compositions. Vertically migrating species clustered with epi- to mesopelagic, non-migrating species, of which only Neocalanus gracilis was moderately enriched in lipids with 16% of dry mass (DM) and stored wax esters (WE) with 37% of total lipid (TL). All other species of this cluster had low lipid contents (〈 10% DM) without WE. Of these, the tropical epipelagic Undinula vulgaris showed highest portions of bacterial markers. Rhincalanus cornutus, R. nasutus and Calanoides carinatus formed three separate clusters with species-specific lipid profiles, high lipid contents (〉=41% DM), mainly accumulated as WE (〉=79% TL). C. carinatus and R. nasutus were primarily herbivorous with almost no bacterial input. Despite deviating feeding strategies, R. nasutus clustered with deep-dwelling, carnivorous species, which had high amounts of lipids (〉=37% DM) and WE (〉=54% TL). Tropical and subtropical calanoid copepods exhibited a wide variety of life strategies, characterized by specialized feeding. This allows them, together with vertical habitat partitioning, to maintain high abundance and diversity in tropical oligotrophic open oceans, where they play an essential role in the energy flux and carbon cycling.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
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    Stable isotope composition of calanoid copepods in the open eastern Atlantic Ocean during POLARSTERN cruise ANT-XXIX/1 (2015)
    PANGAEA
    Details
    Publication Date: 2024-03-09
    Keywords: ANT-XXIX/1; Canarias Sea; Carbon, total; Carbon/Nitrogen ratio; Date/Time of event; Depth, bottom/max; Depth, top/min; Dry mass per individual; Elevation of event; Event label; Latitude of event; Lipid corrected d13C/12C for crustaceans; Longitude of event; MSN; Multiple opening/closing net; Nitrogen, total; Number of individuals; Polarstern; PS81; PS81/001-3; PS81/002-3; PS81/004-4; PS81/005-6; PS81/007-2; PS81/008-6; PS81/009-4; PS81/010-3; PS81/011-4; PS81/012-4; PS81/013-6; PS81/014-4; PS81/015-2; PS81/016-4; PS81/017-7; South Atlantic Ocean; Species; Stage; Station label; δ13C/12C ratio; δ15N/14N ratio
    Type: Dataset
    Format: text/tab-separated-values, 4432 data points
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